Gas burner



June 11, 1935. T. l. FORSTERQ GAS BURNER Filed March 14, 1934 INVENTOR. MW J W www- A TTORNEYS. v

Patentedj June 11, 1935 v i 2 004 317 I J o 123M517 1: 1'" r Thomas answer r;eerl eleyloa ifg"f] V c i .oApplication Marchall; 1934, Serial No.;7 15,464 f f i. l 2 flee s+ This. invention relates to burners r utilizing an enlarged -"chamber 2 'l, with which a port 22 natural or .manuiacturedjgas as a fuel. communicates?"This i port -22 is interior-1y It is the principal object of the presentinvem threaded'and is sur-rounde'd by a boss 23 so that tion to provide an improved burner o'f the chara delivery pipe 24 may be connected therewith .5. acterreferred to, by means of which-anextremelyfor delivering] air'gsteamor oil under-' -pressure 5 high temperature fiame maybe created witha to the enlarged ichamber minimumofiuel un'deriaicomparativelylow pres? described.

p i sure. 1 A *Securedfin the nipples l1 and I8 is a gas de- In practicing the invention, I fit a'burner' head livery tube 2 5, which extends centrally through. lo withaVenturi tube. The gas is-jdeliveredthrough the enlarged chamber2l and which is "so cona jet projecting centrally within theventuri, nected to the nipplesl l andl 'fl as to maintain'the the Venturi: tube being formed with shutter coriinterior of the chamberi l out of commur-ii'cation trolled primary air ports surrounding-the jet 'so with the"in'terior-of thetube 25; f

that the jetwill draw in a maximum of primary "-It willbe noticed that' t'he nipple I 1 islcounteras willbe hereinafter have also provided a means'of injectingsteam, air anforifice fitting z fimay be reinovably fitted to the' or oil under pressure at high 'velocitylinto "the end ofthe tube 2 5 wi thin thenipple l-1." Theinventuri surrounding the jet to increase the temterior wall of the nipple l'l' surrounding the tube perature of the flame 25 is forinediwithaseries'ofinspirator orifices 21 One formwhich the invention may-assume is V exemplifiedin thefollowing description and il111sv v t Q'ne end with -the interior 7 .trated by way of example in the accompanying ofthe 'chambefifl nd at t he"otherendwiththe;

drawing, in which? i V chamber formed in the nipple I! by the counter- Fig. 1 is a view of my improved burner with boring thereof. The manner inwhich this orifice parts thereof broken away'and in section to disfitting 26 is constructed and connected to the 25 close certain features of construction. i tube 25 is clearly illustratedin Fig. vl. By making Fig. 2 is an enlarged view in central section this orifice fitting 26 removable, the diameter of through the injector head. V the orifice'through which gas is injected into the Fig. 3 is an end view of the injector head, of venturi ll maybe readily changed. I v 30 the nozzle end thereof. Y Referring to Fig. 1, it will be seen that the pipe 30 Fig. 4 is an enlarged view showing the manner 24 is fitted with a cross 25a. To this cross is conin which the orifice fitting is connected to the heated a valve controlled pipe 28, which is coninjector head. 7 j nected with a source of air under pressure, and Referringmore particularly to the accompanywitha valve controlled pipe 29 which is connected i any preferred type or design. To the inlet end maining port of the cross 25a. is connected with a air into the venturi for combustion purposes; -I bored inwar-dly from its outer end in order that 15" rfas'h-ion about the tube 25 20 ing drawing, It! indicates a gas burner head of with a source of steam under pressure. Thereof this head, the discharge end of a Venturi tube valve controlled pipe 30, which is connected with 7 II is connected. The opposite or intake end of a source of fuel oil under suitable pressure. the Venturi tube is formed with a series of primary To operate the burner, the shutter I5 is actu- 40 air ports [2 which surrounda central boss l4. ated to open the ports l2, and the valve I9 is then 40 A manually operative shutter I5 is fitted to the opened to enable gas under pressure to pass intake end of the Venturi tube to control the through the tube 25 in the injector head I6 and primary air ports l2. By means of this shutter discharge at comparatively high velocity through I 5 the efiective area of the ports I2 may be reguthe orifice in the orifice fitting 26 into the Venlated, or, in fact, they may be entirely closed. turitube II. The discharging of this gas at high 45 Connected to the central boss M is an injector velocity into the Venturi tube ll draws primary head l6. At one end, this head is formed with air through the shutter-controlledports l2 into a threaded nipple H, which is threaded into the the venturi in sufiicient quantity to form a proper boss 14. The other end of the head is. formed combustible mixture to be delivered to and ignited with a threaded nipple i8 which may be conat the burner head l0.

nected with avalve !9. Connected to the opposite If a flame 'of higher temperature is desired, or'inlet side of this valve I9 is a pipe 20, which either airor steam under pressure may be demay be led to a source of natural or manufactured livered through the pipe 24 to thechamber 2| so gas under a desired pressure. Intermediate the that it will discharge through the orifices 21 into nipples I l and I8 the injector head is formed with the venturi. The velocity of the streams of either through the orifices 21 into the venturi I I, acting as before to draw in a maximum quantity of primary air through the ports I2 and at the same time aid in increasing the temperature of the flame. I

It is obvious from Fig. 1 that by manipulatin the valves of the pipes 28, 29 and 30, air, steam or oil may be admitted to the chamber 2| of the injector head, as desired.

In the event the burner is to be used in heattreating, the shutter i5 is moved to close the ports 42. In this circumstance, either air or steam under pressure is used in conjunction with the gas for combustion purposes.

In those instances where no air should be employed, theshutter I5 is used'to close the ports [2 and the auxiliary steam is delivered to the chamber 2! and discharged into the venturi II through the orifices 21 to aid in the combustion of the gas. Oil may also be injected with the steam, if desired. a 7

From the foregoing it is obvious that I have provided a very efficient burner for utilizing gas as a fuel, by means of which burner flames of skilled in the art without departing from the spirit :of the invention as defined in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. An apparatus of the character described, including a gas burner head, a Venturi tube connected at its outlet end to said head, the intake end of said Venturi tube being formed with a series of primary air ports, a manually operative shutter controlling the effective area of said ports, an injector head connected to said inlet-end of the Venturi tube centrally thereof, an orifice fitting carried by said injector head and having an orifice formed'therethrough for delivering gas into the venturi at high velocity, said injector head having a passageway formed. therethrough for delivering gas to the orifice fitting, said injector head having a chamber formed therein and separated from the gas passageway, and means for separately delivering air under pressure, steam or fuel oil to said chamber, and said injector head having a series of orifices adjacent to and surrounding said orifice fitting whereby fluid under pressure in said chamber will discharge into the venturi at high velocity.,

2. An apparatus of the character described, including a gas burner head, a Venturi tube connected at its outlet end to the said head, the intake end of said Venturi tube being formed with primary air ports, an injector head connected to said inlet end of the Venturi tube centrally thereof, an orifice fitting carried by said injector head and having an orifice formed therethrough for delivering gas into the venturi, said injector head having a passageway formed therethrough for de-* livering gas to the orifice fitting, said injector head having a chamber formed therein and separated from the gas passageway, and means for separately delivering air under pressure, steam or THOMAS VI. FORSTERQ 

